The Tether incident

Ive been wondering what this is for a while.
Looks like a close up of a nail in a cup of tea imo.
But the main thing is the UFO objects flying about, of course the first thought that comes to mind is debris flying about, but thats a lot of debris and some are pulsating. What do you think?

YouTube video

What I think is unless some one has been in space they can't really say what it is because that could be some thing so simple or even unexplainable to the most experienced astronauts. Also what the hell is a tether?

A tethers a cord, or in this case a long thing, that secures something to something else.